Grilled Portobello Mushroom Steaks

These Grilled Portobello Mushroom Steaks are the best meatless entree to impress all of your dinner guests! Made with a quick and delicious marinade, these grilled portobello mushrooms are healthy, naturally vegan, gluten-free, keto, allergy-free, and paleo! Juicy, meaty, and tender, these mushroom caps are easy and ready in 20 minutes, served whole, sliced, or as a burger!

Mushrooms are like a flavor sponge. They soak up all of the flavors that you throw at them! These juicy and tender portobello mushroom steaks are a vegetarian's dream! They're hearty enough to satisfy meat-eaters and flavorful enough to meet the well-developed palate of plant-based eaters. Mushrooms are so versatile and grilling veggies is always next-level! You can turn any humble vegetable into a delicious meaty steak with a few tips and tricks! These portobello mushroom caps are no exception; perfectly umami, smokey, perfectly tender, and charred!

What's The Best Way To Prepare Portobello Mushrooms?

Grilled, of course! You get a delicious, tender, and meaty texture, plus all the deep rich flavors of your marinade, without soggy, bland, chewiness. The grill cooks off excess liquid and charrs the outside just enough to give your a mouth-watering bite in each forkful. Simple, quicker, and more fool-proof than baking or roasting them; just marinate, grill, and serve! Grilling is always a healthier option as well that doesn't require tons of added fats or oil.

Are Portobello Mushrooms Healthy?

Mushrooms are a healthy fungus and portobello mushrooms are the most popular variety to eat! They come in baby bellas and the bigger, mature size with large caps which are used in this grilled steak recipe. Half a cup of raw portobello mushrooms contains only 18 calories, 0g fat, 3g carbs, and 2g protein. They're packed with B vitamins, vitamin D, phosphorus, selenium, copper, potassium, and antioxidants.

Why You'll Love This Recipe

Just large portobello mushroom caps and a super simple marinade for the most flavorful grilled vegetarian entree you've ever had! This recipe is customizable to fit any and all dietary needs, easy to scale for large crowds, or keep it simple for an elegant weeknight dinner at home!

• Gluten-Free
• Vegan & Vegetarian
• Allergy-free (Dairy-Free, Soy-Free, Egg-Free, Nut-Free, Peanut-Free, Wheat-Free, Sesame-Free, Coconut-Free, Corn-Free)
• Keto, Low-Carb, Paleo
• Sugar-Free & Low-Calorie
• Customizable
• Kid-Friendly
• Simple Meatless Main, Topping For Salads, Grilled Patty For Burgers
• Great For Grilling, BBQs, Cookouts, & Summer Entertaining

Ingredients For Grilled Portobello Mushroom Steaks

• Large Portobello Mushrooms: Large Portobello mushrooms, about 4-5 inches in width. They shrink slightly when cooked so you'll want nice big thick meaty-looking mushroom caps!
• Balsamic Vinegar: The deep, tangy, slightly sweet, and syrupy flavors of a good quality balsamic vinegar add so much depth to this marinade.
• Coconut Aminos or Vegan Fish Sauce: Salty coconut aminos (aka soy-free/gluten-free soy sauce) or vegan fish sauce add that umami kick that lingers on the tongue.
• Extra Virgin Olive Oil: Just a splash of great-tasting olive oil ties all the flavors together,  helps coat the mushroom caps and keeps them from sticky to the grill.
• Seasonings: You can add your own spin here and season to taste, but I used a combo of salt, black pepper, dried oregano, garlic powder, onion powder, and smoked paprika for extra grilled smokiness!

Ways To Customize Your Portobello Steaks:

• Dijon Mustard: If you want an extra spicy tang, you can add a teaspoon or two of Dijon mustard to the marinade. Spicy brown mustard would work well too!
• Dried Herbs: Feel free to swap in any other dried herbs! Some delicious ideas include rosemary, thyme, tarragon, and parsley.
• Hot Sauce: If you want to make your portobello steaks spicy, add a splash of your favorite hot sauce to the marinade!
• Vegan Worcestershire or Liquid Smoke: Add classic smokey and steak-like flavors with a splash of vegan Worcestershire sauce or liquid smoke (make sure they're gluten and soy-free!)
• BBQ Sauce: Add a few tablespoons of your favorite bbq sauce to the marinade for a seriously delicious grilling recipe!
• Sweetness: Maple syrup or vegan honey can create a pleasantly sweet and savory experience!

How To Remove The Gills From Portobello Mushrooms For Grilling

1. First, you'll need to clean your portobello mushrooms by lightly brushing away any dirt and debris from the outside, gently popping the stem off (if it doesn't come off easily with your hands, slice it off with a knife), and then use a spoon to remove the gills so you have a nice flat mushroom steak to grill.
2. Lightly use the edge of the spoon to scrape the gills off the mushroom. They should come off easily. Removing the gills prevents any hard-to-clean dirt and sand from ruining your final dish and reduces murky and bitter flavors.

How To Grill Portobello Mushrooms

3. After cleaning the mushrooms, whisk together the marinade ingredients in a large wide bowl.
4. Add the cleaned portobello caps to the marinade, brush the marinade on all surfaces, and allow them to sit for 5-10 minutes while you preheat your grill.

5. Remove the mushrooms from the marinade, reserving the excess liquid in the bowl, and add the mushrooms, gill side down, on the hot grill. Grill the first side for 4-5 minutes, brushing the tops with extra marinade before flipping.
6. Use tongs to flip the mushroom caps over to grill the other side for 3-4 more minutes, giving them a final brush of marinade. Remove the caps from the grill and serve.

How Long To Grill Portobello Mushrooms

How long you have to grill your mushrooms depends on their thickness. I found 4-5 minutes to work best for the first side and another 3-4 for the second side. After the first 1-2 minutes, the mushrooms start to release their liquids and soften, making the process quicker and easier as the mushrooms get slightly smaller and flatter.

Indoor vs. Outdoor Grill

When making a small batch (like the 2 servings for this recipe), using a non-stick indoor grill pan is best. If you plan on making a large batch for a party and including the mushrooms as an option during your cookout, using an outdoor grill is perfectly acceptable! The mushrooms may grill up quicker due to the higher heat. Make sure to brush the outdoor grill with olive oil to prevent sticking.

Recipe Tips & Tricks

• Don't over-marinate the mushrooms. Leaving them in the marinade too long will lead to soggy and chewy mushroom steaks. More than 10 minutes is no needed.
• Make sure your grill is hot and greased! Use a lightly greased non-stick grill pan or a liberally greased outdoor grill. The outer skin of the mushrooms will get stuck and peel off when trying to flip the mushrooms if your grill isn't greased.
• When grilling the mushrooms, keep the heat at about medium-high or about 375 to 425°F.
• For grilled portobello burgers, start by grilling the cap side down first so that when you flip to the second side, you can add a slice of vegan cheese to the caps and the cheese will melt around the mushroom tops.

Storing Leftovers

Grilled Portobellos are best eaten right away, however, if you want to store leftovers, you can allow them to cool, slice up the caps, and store the grilled mushroom slices in a container in the fridge for 3-4 days. Use the leftovers cold in salads or bowls the next day for lunches or light dinners! You can also reheat them, you can leave them whole or sliced and heat them slowly in a skillet on the stove over medium-low heat until warmed through.

What To Serve With Grilled Portobello Mushrooms

You can serve these grilled portobellos as a main entree, side dish, topping on salads or bowls, as burgers, or in a breakfast hash! Top the mushroom steaks with guacamole, vegan cheese sauce, sour cream, ketchup, bbq sauce, or red pepper hummus. Serve them with coleslaw, Italian pasta salad, potato salad, air-fried potatoes, or mashed potatoes!

More Grilled Vegetables:

• Grilled Cabbage Steaks
• BBQ Grilled Eggplant Steaks
• Grilled Ginger Cauliflower Steaks 
• Grilled Eggplant Banh Mi Sliders
• Grilled Plantains

Print

These portobello mushrooms are the perfect versatile veggie to turn even the biggest meat-eater into a veggie-loving convert!

So tell me:

+ What is your favorite way to serve portobello mushrooms? These stuffed mushrooms are a classic!

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